Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit ac0a5dd6 authored May 21, 2012 by Alan Cox Committed by Dave Airlie May 22, 2012

gma500: Prevent endless loop in panel power up sequence



Some devices don't have a panel connected to LVDS and thus will never power up.
This patch checks the power sequence progress bits in PP_STATUS to prevent an
endless loop on such devices.

Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

parent 3299de95

drivers/gpu/drm/gma500/psb_lid.c

+9 −3

Original line number	Diff line number	Diff line
		@@ -40,10 +40,16 @@ static void psb_lid_timer_func(unsigned long data)
		REG_WRITE(PP_CONTROL, REG_READ(PP_CONTROL) \| POWER_TARGET_ON);
		do {
		pp_status = REG_READ(PP_STATUS);
		} while ((pp_status & PP_ON) == 0);
		} while ((pp_status & PP_ON) == 0 &&
		(pp_status & PP_SEQUENCE_MASK) != 0);

		if (REG_READ(PP_STATUS) & PP_ON) {
		/FIXME: should be backlight level before/
		psb_intel_lvds_set_brightness(dev, 100);
		} else {
		DRM_DEBUG("LVDS panel never powered up");
		return;
		}
		} else {
		psb_intel_lvds_set_brightness(dev, 0);